1、Carbon Steel: These black shelf brackets is made from premium carbon steel material, which is sturdy and durable. 2、Unique Design: These black shelf brackets features protrusion design that could make your shelf more firm and stable. 3、Wide Application: These black shelf brackets are widely used in kitchen, bathroom, bedroom, office and so on. 4、Thickened Size: These black shelf brackets have been thickened and widened, which ensures high reliability. 5、Easy Assembly: You will receive 4 pieces black shelf brackets with 16 screws and 8 expansion tubes, more convenience for assembly. Item Type: Shelf Bracket Material: Carbon Steel Scope of Application: Study, Balcony, Bedroom, Bathroom, Living Room Product Size: Approx. 184 x 133 x 40 x 25 x 6mm / 7.25 x 5.23 x 1.57 x 0.98 x 0.23in ( Manual Measurement, Slight Error May Exist ) Weight: Approx. 2570g / 90.65oz 4 x Shelf Bracket 8 x Expansion Tube 16 x Screws